Why are your parents type o blood and you are rh a?

Answer 1

Two parents with blood types A and B can indeed have a child with blood type O.

Each person has two of the three types, A, B, and O, so thay are AA, AB, AO, BB, BO, or OO. O is recessive, so these result in an overall type of A, AB, A, B, B, or O, respectively.

Each parent gives one of their types to the child, so if the parents are AO and BO, then the child could be AB, AO, BO, or OO, with the last case resulting in an overall type of O.

Answer 2

Yes. AO + BO --> AB, AO, BO, and OO. The AB would be AB, and the OO would be O. However, if you knew the genotype (not just the phenotype) of one of the parents, and he or she were AA or BB (rather than AO or BO), then the answer would be No. For example, let's say the type A parent had parents who were both type AB. Then there's no way the type A parent could be AO.

Answer 3

We are looking for the possible blood types of a baby.

Parental information:

• Mother type B --can be BB or BO = contributes a B or O gene
• Father type O -- can only be OO = contributes an O gene

Baby receives one gene from each parent:

• Baby is type BO = Type B
• Baby is type OO = Type O

Generally, parents who are type B & O can only have a baby who is Type B or O.

HOWEVER: There is more to ABO blood typing that just the ABO gene.

There is also an inhibitory gene that will change any genotype into the phenotype O.

Therefore a person with genetically AB blood can be tested as having Type O.

• Baby is type A+ which can be genetically AA or AO

If the "father" has the inhibitory gene affecting his AA, AO or AB type,

then the Type A baby is definitely possible.

Answer 4

Humans are diploid so every person inherits two versions of all genes that are not on the sex chromosomes (There are certain exceptions to this in conditions such as Downs syndrome). The gene determining the ABO blood group of the is not on a sex chromosome so every person inherits two copies of the gene. This gene has 3 versions known as alleles. The genes for A and B are Co-dominant and are thus are both expressed in a person who has both. A and B are also dominant over the O type, so any person with O blood type must have inherited O from both their parents. The parents in the question must both be carrying the O allele which is not expressed because A and B are dominant over it. The child then inherited one O allele from each parent producing a blood type of O. In short it is perfectly possible.

Answer 5

A person with a "B" blood type can only result from parents whose blood types are: B + B or B + O. Also, if the parents both have "O" blood types, then the child can only have an "O" blood type.

Answer 6

This is possible if both parents have heterozygous blood types. One parent could be A (Ai) and the other B (Bi). Each passes down an allele to the child. So the child would receive A or i from one parent and B or i from the other. Thus, if the child receives i from both parents, he/she could be blood type O (ii).

Answer 7

We are looking for the possible blood types of a baby.

Parental information:

• Mother type O -- can only have OO = contributes O gene
• Father type A -- can have AA or AO = contributes A or O gene

Baby receives one gene from each parent:

• Baby is type AO
• Baby is type OO

Generally a child of Type O and Type A parents will be either Type A or O.

HOWEVER: There is more to ABO blood typing that just the ABO gene.

There is also an inhibitory gene that will change any genotype into the phenotype O.

Therefore a person with genetically AB blood can be tested as having Type O.

If the Type O parent has the inhibitory gene affecting his Type A, B or AB blood, then the baby may also be Type AB or Type B.

Answer 8

one of the parents can be a carrier of blood type o

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One of the parents is Ao and the other is Bo. The child got both o's and so became O. Both parents are carriers.

Answer 9

i just want to know. MY DAD IS MY DAD